Washington, District of Columbia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49 °F (low) to 67.3 °F (high). Annual precipitation averages 45.2 Inches. Washington is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 28.6 °F | 44.3 °F | 3.1 in. |
| February | 30.0 °F | 47.7 °F | 2.69 in. |
| March | 36.8 °F | 55.7 °F | 3.91 in. |
| April | 46.8 °F | 67.4 °F | 3.45 in. |
| May | 56.5 °F | 75.8 °F | 4.45 in. |
| June | 65.7 °F | 84.5 °F | 4.53 in. |
| July | 70.5 °F | 89.0 °F | 4.58 in. |
| August | 68.7 °F | 87.2 °F | 3.63 in. |
| September | 62.1 °F | 80.5 °F | 4.25 in. |
| October | 50.1 °F | 69.2 °F | 3.84 in. |
| November | 39.8 °F | 58.0 °F | 3.08 in. |
| December | 32.9 °F | 48.4 °F | 3.69 in. |
| Annual | 49 °F | 67.3 °F | 45.2 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |